• EpicFailGuy@kbin.social
    116·
    1 year ago

    @nx2

    For the curious

    10G Base LR: It’s a type of fiber standard that runs a 10 gigabits. and looks like this

    QSFP 40G: It’s a DIFFERENT type of fiber standard that runs at 40 gigs and looks like this

    I only know the basics of fiber networking but I know that different standards are needed because light refracts differently depending on cable thickness and composition, so standards/variations of the same standard have different maximum length, bandwidth, collision detection, etc.

    For example, the type of fiber that you use to connect two offices that are 10 miles apart is going to be very different than the fiber you use to connect your SAN storage to your baremetal ESXI servers.

    In essence, OP is asking if he can connect his phone line to the port on the back of the computer, and the answer is “Yes, but it’s not that simple, and you probably don’t want to do that anyways”

    • Bazinga@lemm.ee
      293·
      1 year ago

      Explained by ChatGPT:

      The image shows a post from a platform or forum, likely named “Lemmy,” where a user with the handle “ky56” is asking a technical question related to networking.

      Here’s a breakdown of the technical terms:

      1. 10GBase-LR: This refers to a specific standard of Ethernet transceiver module that can support data rates of up to 10 Gbps (Gigabits per second) and works over single-mode fiber. The “LR” in the name stands for “Long Range,” indicating that this module is designed for longer distance transmissions, typically up to 10 kilometers.

      2. QSFP-40G-LR4: “QSFP” stands for Quad Small Form-factor Pluggable. It’s a compact, hot-pluggable transceiver used for data communications applications. The “40G” indicates its data rate, which is 40 Gbps. The “LR4” suggests it’s designed for long-range transmissions, typically up to 10 kilometers, and it uses a 4-lane architecture.

      3. CWDM: Stands for Coarse Wavelength Division Multiplexing. It’s a technology that multiplexes multiple optical signals on a single fiber by using different wavelengths (i.e., colors) of laser light. This technique enables multiple channels to be transmitted over a single fiber, increasing the overall capacity of the communication link.

      The user’s question is about whether they can connect a 10GBase-LR module to a QSFP-40G-LR4 module using CWDM technology. Essentially, they’re asking if it’s possible to interconnect these two types of transceivers, which operate at different data rates, using a technology that allows multiple wavelengths on a single fiber.

      • nomecks@lemmy.world
        6·
        1 year ago

        You can just connect a normal fiber between a 10G SFP and a 40G QSFP and let the 40G end auto negotiate to 10G. Fanout cables are better for density though.

        • MxM111@kbin.social
          1·
          1 year ago

          Does 40G QSFP transponder be able to even communicate with 10G SFP? Do they even have the same encoding? OOK? QPSK?

          • lud@lemm.ee
            2·
            1 year ago

            Seems to work mostly fine: https://community.fs.com/blog/40g-qsfp-to-10g-sfp-configuration-guide.html

            Considerations for QSFP+ to SFP+ Split

            Usually, this split configuration is supported on most switches provided by different vendors regardless of standalone and stacked ones. Certainly, you still need to check this function in the instruction of your switch or consult your vendor, as it’s the most basic condition of splitting QSFP+ to SFP+ configuration. Sometimes, most ports on a switch support split, but some don’t. In other cases, when a switch is deployed as a leaf switch, some ports do not support the split. Or when the port is already used as a stack port, this may also limit split configuration. Thus the conditions can be quite different based on your applications.

    • 4am@lemm.ee
      10·
      1 year ago

      You probably want to simplify your example to “the servers you’d connect in the same room” rather than going into “SAN” and “ESXI” or else they only people who will understand are going to be all the /r/homelab refugees in c/selfhosted, and they already all taken what this was about anyway lol

  • Num10ck@lemmy.worldEnglish
    36·
    1 year ago

    it’s about fiber optic cables that the connector shape fits but the way the light spectrum carries data is different.

  • davehtaylor@beehaw.org
    262·
    1 year ago

    Of course you can! You decouple the hydrocoptic marzelvane, and insert it perpendicular to the sperving bearing

  • riodoro1@lemmy.world
    251·
    1 year ago

    Ducktape will hold the two cables together easy. What a moron to be asking that question.

  • GuyFi@lemmy.sdf.org
    16·
    1 year ago

    Yeah, you just need a patch cable into a split coil humbucking electric bass guitar and a degree in aerospace engineering, pretty simple actually

  • Lung@lemmy.world
    7·
    1 year ago

    Yeah this is why I really like Lemmy. It feels like early Reddit where people are actually worth talking to. People that can change their minds, or learn, or be kind

    Maybe it’s an ego trip, but people seem more engaged with what I have to say here. A lot of the time on Reddit, I’ll say something I think is worthwhile, and then just get some random trolls, or a contrarian, or someone not driven by reason to begin with

    Like yes the community is small and maybe shrinking atm, but the quality is pretty high. I like the offbeat memes and all the piracy & tech stuff. I like that the admins seem to care. Content actually gets seen since the volume is not too out of control

    Idk how long it’s gonna last, but I think Lemmy is the new sweet spot for the social media refugees

  • janWilejan@kbin.social
    81·
    1 year ago

    It’s a meme. This image shows a lemmy user asking a highly technical question and a caption saying that that is the least technical user, implying that all other lemmy users are even more technical.